Who will make best use of the reworked Black Cleaver?

Hydra is also core on him, so it would be easy to apply the aoe buff by diving into the enemy team when they're grouped.

I'm not sure if I would say that, though I do agree it could do with some work. Frozen Mallet will still a better option for peeling and chasing people for your team while Black Cleaver will be a better selfish item for damage and CDR. They'll both have their niche.

Honestly, I could see a lot of champions who build one item pick up the other as well. A bruiser with Black Cleaver, Thornmail, and Frozen Mallet could be very annoying to deal with.

Somebody didn't watch Hercules.

It's kind of neutral for him. He does lose some Armor pen and the early brutalizer power spike, but he gets more sticking power/kiting ability, more CDR, more health, and more armor shred. He will benefit from the change, but it makes him just a tad weaker in the early-earlymidgame. His latemid -lategame will still be strong, and in fact stronger thanks to the item change. I'm interested in seeing how his rework goes and if the item will still be strong on him, but as it stands, he will heavily benefit from this item.